This could be an airleak after the airflow meter, any expose dragged in here isn t seen by the ECU and thus not compensated for and can thin the engine out and can along with permit the engine to rev stirring next not desired causing prickly running. As its a mechanical deviation it tends not to position on the anomaly light and you can sometimes hear a hissing noise next the engine running.
Its after that worth getting the fuel pressure checked as if this is low due to a blocked filter or faulty regulator or even a under the weather pump will all consequences in insufficient fuel swine delivered to the engine. Might as a consequence be worth cleaning out the idle quickness rule motor / valve as these get clogged in the works taking into account carbon and some brake cleaner washed through helps forgive things off.
I'm reviewing your ask now, and will reveal encourage once your respond ASAP. Rgds Greg. What malformation codes attain you have. Does the engine rule like the MAF disconnected. gone the loud hissing hermetic this could be your problem. This could be a large vacuum leak ,with the MAF joined it is lonely measuring the expose that is getting subsequent to the MAF, thus if the intake manifold is sucking in let breathe the ventilate to fuel ratio will be totally out and cause the engine to stal